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[v2,03/16] Input: add INPUT_PROP_HAPTIC_TOUCHPAD

Message ID 20220114183152.1691659-4-acz@semihalf.com (mailing list archive)
State New, archived
Headers show
Series *** Implement simple haptic HID support *** | expand

Commit Message

Angela Czubak Jan. 14, 2022, 6:31 p.m. UTC 
INPUT_PROP_HAPTIC_TOUCHPAD property is to be set for a device with simple
haptic capabilities.

Signed-off-by: Angela Czubak <acz@semihalf.com>
---
 Documentation/input/event-codes.rst    | 14 ++++++++++++++
 include/uapi/linux/input-event-codes.h |  1 +
 2 files changed, 15 insertions(+)
diff mbox series

Patch

diff --git a/Documentation/input/event-codes.rst b/Documentation/input/event-codes.rst
index b24ae7d292cc..bbf2510c2b1a 100644
--- a/Documentation/input/event-codes.rst
+++ b/Documentation/input/event-codes.rst
@@ -390,6 +390,20 @@  can report through the rotational axes (absolute and/or relative rx, ry, rz).
 All other axes retain their meaning. A device must not mix
 regular directional axes and accelerometer axes on the same event node.
 
+INPUT_PROP_HAPTIC_TOUCHPAD
+--------------------------
+
+The INPUT_PROP_HAPTIC_TOUCHPAD property indicates that device:
+- supports simple haptic auto and manual triggering
+- can differentiate between at least 5 fingers
+- uses correct resolution for the X/Y (units and value)
+- report correct force per touch, and correct units for them (newtons or grams)
+- follows the MT protocol type B
+
+Summing up, such devices follow the MS spec for input devices in
+Win8 and Win8.1, and in addition support the Simple haptic controller HID table,
+and report correct units for the pressure.
+
 Guidelines
 ==========
 
diff --git a/include/uapi/linux/input-event-codes.h b/include/uapi/linux/input-event-codes.h
index 225ec87d4f22..df2ba5da4eaa 100644
--- a/include/uapi/linux/input-event-codes.h
+++ b/include/uapi/linux/input-event-codes.h
@@ -27,6 +27,7 @@ 
 #define INPUT_PROP_TOPBUTTONPAD		0x04	/* softbuttons at top of pad */
 #define INPUT_PROP_POINTING_STICK	0x05	/* is a pointing stick */
 #define INPUT_PROP_ACCELEROMETER	0x06	/* has accelerometer */
+#define INPUT_PROP_HAPTIC_TOUCHPAD	0x07	/* is a haptic touchpad */
 
 #define INPUT_PROP_MAX			0x1f
 #define INPUT_PROP_CNT			(INPUT_PROP_MAX + 1)